All good meetings are similar, but each bad meeting is shitty in its own way. I could also say that it's hard to formalize elements that make meetings ineffective, but that's not true: I have a neat list. All summarized to one point is: being lazy. Organizing a good meeting …

What is a Javascript Promise? When I was documenting the Neo4j Javascript driver, I did not know. So let's find out, and in so doing tear to pieces explanations I found online. My favorite past time.

W3Docs

In JavaScript, a promise is a unique object linking the "producing code" and …

Early in 2022, I started getting emails from Google, warning that starting from 2023 they would retire Universal Analytics (UA), which is what everybody uses to track views from Google Analytics in this decade. Closer inspection revealed that this was not a simple change: they were in fact retiring all …

I had a long summer and decided I would do something to improve the ergonomics of my tech life. Many years ago I bought a Kinesis Advantage, but I was young and naive, and gave up after a week. This time, with all the wisdom of my late twenties, I …

The following WP-CLI command will create a lot of test data into a WordPress site: 1000 new users, each with 50 posts. Each post gets a random date in the last year and a random post content of variable length filled using a lorem ipsum generator.

WP_CLI::add_command( 'test', 'create_test_data …

It is difficult to argue that the current, wide popular 8-hour workday in cognitive-demanding jobs is in any way efficient. It is bad both for employees and employers. Quoting the Harvard Business Review,

Many of today’s organizations sabotage flow by setting counter-productive expectations on availability, responsiveness, and meeting attendance …

I am definitely not an expert in networking, so take all of this with some salt. Still, I found it valuable to have my home internet powered by open source software as much as possible, rather than some shitty closed black-box provided by my ISP.

There are already lots of …

If you expose your bbPress forums to the public, it is likely you will be getting loads of spam every day. Most of it is actually caught either by WordPress itself, and set as pending, or by Akismet, and set as spam. Either way,

1. bulk purging pending content is not …

My old Android smartphone fell too many times and had its physical buttons (back, home, recent apps) not working, which was problematic to do anything. You can go back with in-app buttons most of the times, but there is no way to switch app or to go back to the …

A while ago I decided I did not want to be a product anymore, and start paying for services. I started by breaking free from all the free-but-commercial company services such as Dropbox and Gmail, and ultimately ended up ditching all non open source software on my phone, doing away …

First create a new sink:

pactl load-module module-null-sink sink_name=zoom_input sink_properties=device.description=zoom_input

then remap into a Zoom monitor source that Zoom will allow selection of:

pactl load-module module-remap-source master=zoom_input.monitor source_name=zoom_mic source_properties=device.description="zoom_mic"

Then create as many new virtual sources as microphones you need …

The FEniCS project allows for simple solution of partial differential equations. However, getting started from examples is so quick, it is easy to miss how the inner-workings of it behave. This should not happen (especially if it is a PhD project). There are three vital pieces of the puzzle that …

So, found myself installing IRAF on a friend's laptop running Ubuntu. There are some decent tutorials online about the general steps: for example, this one, and the official one. However, they all skip all possible issues that could come up (or at least, that popped up in my case). This …

I spent a good week trying to get Windows 7 to work on a modern laptop, having an Intel i3 8th generation CPU and other recent components, such as a NVMe SSD. What I did not know in the first place, is that officially, Windows 7 does not support Intel …

Here is the pdf slides of my presentation about Meltdown, the security vulnerability. First are full slides, then real presentation slides (with stops when asking questions/pausing and pondering). Free for re-use, but nice to cite.

This version is just full slides, with no interruptions.

This version is slides with …

This is a writeup for the Endless Christmas challenge, md5 hash 866c92038d6e9fc47db4424f71f6167a (download binary). It appeared in the X-MAS CTF, and it's a Reverse challenge.

Using afl with Radare we can see there are calls to write and execve, both happening in main, a sign that this program creates (and …

One of the very few things I learnt in art class is what the role of Jackson Pollock was in his art. Because, we were asked, what is the role of the artist, if the only thing he does is let paint drop on a canvas? His role is to …

If you are a tech company, and your people commit code, then you probably have some code review policy. And if you do not, you definitely should: you want to have an extra pair of eyes on the code that goes live. You certainly do not want a mistake to …

Some months ago, I changed one link in the menu in my website postpaycounter.com. After that, it looked to me more people were purchasing products, i.e. the conversion rate had increased. But how to check whther that was really the case, or if it was just an accident …

During a Computational Vision lab, while comparing histograms, I stumbled upon a peculiar behavior. The histograms pairwise kernel matrix - which is just a fancy name for the matrix holding histograms correlations one with another - did not have ones on the diagonal. This means that one histogram was not fully correlated …